G-parity-violating amplitudes in the J/ψ → π+π- decay

被引：6

作者：

Ferroli, Rinaldo Baldini ^{[1
]}

Mangoni, Alessio ^{[2
,3
]}

Pacetti, Simone ^{[2
,3
]}

机构：

[1] INFN, Lab Nazl Frascati, Frascati, Italy

[2] Univ Perugia, Dipartimento Fis & Geol, Perugia, Italy

[3] INFN, Sez Perugia, Perugia, Italy

来源：

PHYSICAL REVIEW C | 2018年 / 98卷 / 04期

关键词：

ANNIHILATION;

D O I：

10.1103/PhysRevC.98.045210

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The decays of the negative G-parity meson G-parity into even numbers of pions violate G-parity. Such decays, as well as other G-parity decays into hadrons, can be parametrized in terms of three main intermediate virtual states: one photon, one photon plus two gluons, and three gluons. Since the electromagnetic interaction does not conserve G-parity, G-parity decays into positive G-parity final states should be dominantly electromagnetic. Nevertheless, the one-photon contribution to J/psi ->pi(+)pi(-), that can be estimated by exploiting the cross section sigma(e(+)e(-)-> pi(+)pi(-)), differs from the observed decay probability for more than 4.5 standard deviations. We present a computation of the gg gamma amplitude based on a phenomenological description of the decay mechanism in terms of dominant intermediate states eta gamma, eta'gamma and f(1)(1285)gamma. The obtained value is of the order of the electromagnetic contribution.

引用

页数：11

共 18 条

[11] ELECTROMAGNETIC ANNIHILATION OF E+E- INTO QUARKONIUM STATES WITH EVEN CHARGE CONJUGATION
KUHN, JH
KAPLAN, J
SAFIANI, EGO
[J]. NUCLEAR PHYSICS B, 1979, 157 (01) : 125 - 144
[12] Precise measurement of the e+e- → π+π-(γ) cross section with the initial-state radiation method at BABAR
Lees, J. P.
Poireau, V.
Tisserand, V.
Garra Tico, J.
Grauges, E.
Palano, A.
Eigen, G.
Stugu, B.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Lynch, G.
Koch, H.
Schroeder, T.
Asgeirsson, D. J.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Khan, A.
Blinov, V. E.
Buzykaev, A. R.
Druzhinin, V. P.
Golubev, V. B.
Kravchenko, E. A.
Onuchin, A. P.
Serednyakov, S. I.
Skovpen, Yu. I.
Solodov, E. P.
Todyshev, K. Yu.
Yushkov, A. N.
Bondioli, M.
Kirkby, D.
Lankford, A. J.
Mandelkern, M.
Atmacan, H.
Gary, J. W.
Liu, F.
Long, O.
Vitug, G. M.
Campagnari, C.
Hong, T. M.
Kovalskyi, D.
Richman, J. D.
West, C. A.
Eisner, A. M.
Kroseberg, J.
Lockman, W. S.
Martinez, A. J.
Schumm, B. A.
Seiden, A.
[J]. PHYSICAL REVIEW D, 2012, 86 (03)
[13] DOES J/PSI-]PI+PI- FIX THE ELECTROMAGNETIC FORM FACTOR-F-PI(T) AT T=M(J PSI)(2)
MILANA, J
NUSSINOV, S
OLSSON, MG
[J]. PHYSICAL REVIEW LETTERS, 1993, 71 (16) : 2533 - 2536
[14] REVIEW OF PARTICLE PHYSICS Particle Data Group
Olive, K. A.
Agashe, K.
Amsler, C.
Antonelli, M.
Arguin, J. -F.
Asner, D. M.
Baer, H.
Band, H. R.
Barnett, R. M.
Basaglia, T.
Bauer, C. W.
Beatty, J. J.
Belousov, V. I.
Beringer, J.
Bernardi, G.
Bethke, S.
Bichsel, H.
Biebel, O.
Blucher, E.
Blusk, S.
Brooijmans, G.
Buchmueller, O.
Burkert, V.
Bychkov, M. A.
Cahn, R. N.
Carena, M.
Ceccucci, A.
Cerri, A.
Chakraborty, D.
Chen, M. -C.
Chivukula, R. S.
Copic, K.
Cowan, G.
Dahl, O.
D'Ambrosio, G.
Damour, T.
de Florian, D.
de Gouvea, A.
DeGrand, T.
de Jong, P.
Dissertori, G.
Dobrescu, B. A.
Doser, M.
Drees, M.
Dreiner, H. K.
Edwards, D. A.
Eidelman, S.
Erler, J.
Ezhela, V. V.
Fetscher, W.
[J]. CHINESE PHYSICS C, 2014, 38 (09)
[15] Study of the φπ0 transition form factor
Pacetti, Simone
[J]. NUCLEAR PHYSICS A, 2013, 919 : 15 - 31
[16] 1+/-(+) RESONANCES IN GAMMA-GAMMA-COLLISIONS
RENARD, FM
[J]. NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS, 1984, 80 (01): : 1 - 11
[17] f1 (1285) → e+e- decay and direct f1 production in e+e- collisions
Rudenko, A. S.
[J]. PHYSICAL REVIEW D, 2017, 96 (07)
[18] Electromagnetic Structure of the Proton, Pion, and Kaon by High-Precision Form Factor Measurements at Large Timelike Momentum Transfers
Seth, Kamal K.
Dobbs, S.
Metreveli, Z.
Tomaradze, A.
Xiao, T.
Bonvicini, G.
[J]. PHYSICAL REVIEW LETTERS, 2013, 110 (02)

← 1 2 →